Atopy in chronic urticaria: an important yet overlooked issue

Area of Science:

• Dermatology
• Immunology
• Allergy

Background:

• Chronic urticaria (CU) significantly impacts patient quality of life, yet its pathogenesis is not fully understood.
• While autoimmunity in chronic spontaneous urticaria (CSU) is studied, the role of atopy in CU is often overlooked.
• Atopy, characterized by immune responses to allergens, type 2 inflammation, and IgE overproduction, is prevalent in CU patients.

Purpose of the Study:

• To review current knowledge on the association between atopy and chronic urticaria.
• To explore the potential role of atopy in the pathogenesis of various CU subtypes.
• To provide a new perspective on understanding CU clinical features and guiding future research.

Main Methods:

• Literature review of studies investigating atopy in chronic urticaria.
• Analysis of the correlation between atopic background and CU clinical characteristics.
• Examination of IgE levels and inflammatory markers in CU patients with and without atopy.

Main Results:

• Patients with CU exhibit a higher prevalence of atopy compared to healthy individuals.
• Elevated total IgE levels are observed in CU patients, correlating with disease characteristics.
• Evidence suggests local and systemic atopic inflammation contributes to CU pathogenesis.

Conclusions:

• Atopy is a significant factor in chronic urticaria, potentially defining specific CU subtypes (e.g., atopic CSU, atopic CIndU).
• Further research into atopy's role is crucial for a comprehensive understanding of CU pathogenesis.
• Recognizing atopy offers new insights into CU's clinical presentation and management.